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Count Days

Calculate the number of calendar days between a start date and an end date, or shift a date forward or backward by years, months, weeks, and days. Useful for schedules, travel, billing, recurring reminders, and deadline math.

[ MODE: LOCAL ] [ RANGE: CALENDAR ] [ END DATE: TOGGLE ] [ TODAY: ] [ TZ: ]
[ DATE RANGE INPUT ]
> enter two calendar dates to count full-day distance • inclusive mode adds the final date to the total
[ ADD / SUBTRACT DATE ]
> repeat mode applies the same offset again and again • max 50 results
> months and years preserve calendar intent when possible • if the target month is shorter, the result clamps to that month's last valid date
[ FIELD NOTES ]
> Excluding the end date is the standard 'days between' count.
> Turn on end-date inclusion for bookings, leave requests, rentals, or other inclusive ranges.
> This calculator works with calendar dates only, so daylight-saving shifts do not skew the day count.
> Month and year offsets keep the same day when possible, then clamp to the last valid day of the target month.
> Repeated offsets apply cumulatively, so each new result uses the prior result as its starting point.
COMMON USES
Trip planning and hotel stays
Project timelines and delivery windows
Subscription, billing, or contract spans
Recurring reminders, payroll cycles, and renewals

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